package com.kcwx.web.controller.common;

import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import com.kcwx.common.config.KcwxConfig;
import com.kcwx.common.constant.Constants;
import com.kcwx.common.core.domain.AjaxResult;
import com.kcwx.common.utils.StringUtils;
import com.kcwx.common.utils.file.FileUploadUtils;
import com.kcwx.common.utils.file.FileUtils;
import com.kcwx.framework.config.ServerConfig;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;

import com.kcwx.shareddomain.common.dto.AttachFileDto;

/**
 * 通用请求处理
 * 
 */
@Api(tags = "通用请求处理")
@RestController
@RequestMapping("/common")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     */
    @ApiOperation("通用下载请求")
    @GetMapping("/download")
    public void fileDownload(String fileName,HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = KcwxConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
//            if (delete)
//            {
//                FileUtils.deleteFile(filePath);
//            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @ApiOperation("通用上传请求（单个）")
    @PostMapping("/upload")
    public AjaxResult uploadFile(@RequestParam("file") MultipartFile file) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = KcwxConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileUrl = FileUploadUtils.upload(filePath, file);
            String savePath=fileUrl.replace(Constants.RESOURCE_PREFIX,"");
            //String url = serverConfig.getUrl() + fileName; //完整的请求路径
            String fileSize=FileUploadUtils.getFileSize(file);
            String fileExt=FileUploadUtils.getExtension(file);
            AttachFileDto attachFileDto=new AttachFileDto();
            attachFileDto.setRealName(file.getOriginalFilename());
            attachFileDto.setFileType(file.getContentType());
            attachFileDto.setFileExt(fileExt);
            attachFileDto.setFileSize(fileSize);
            attachFileDto.setFileUrl(fileUrl);
            attachFileDto.setFilePath(savePath);
            return AjaxResult.success(attachFileDto);
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @ApiOperation("通用上传请求（多个）")
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(@RequestParam("files") List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = KcwxConfig.getUploadPath();
            List<AttachFileDto> attachFileDtoList=new ArrayList<>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileUrl = FileUploadUtils.upload(filePath, file);
                String savePath=fileUrl.replace(Constants.RESOURCE_PREFIX,"");
                //String url = serverConfig.getUrl() + fileName;//完整的请求路径
                String fileSize=FileUploadUtils.getFileSize(file);
                String fileExt=FileUploadUtils.getExtension(file);
                AttachFileDto attachFileDto=new AttachFileDto();
                attachFileDto.setRealName(file.getOriginalFilename());
                attachFileDto.setFileType(file.getContentType());
                attachFileDto.setFileExt(fileExt);
                attachFileDto.setFileSize(fileSize);
                attachFileDto.setFileUrl(fileUrl);
                attachFileDto.setFilePath(savePath);
                attachFileDtoList.add(attachFileDto);
            }
            return AjaxResult.success(attachFileDtoList);
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @ApiOperation("本地资源通用下载")
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = KcwxConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }
}
